IsJSON

Evaluates whether a string is in valid JSON (JavaScript Object Notation) data interchange format.

Method Signature

IsJSON(var=[any])

Arguments

Argument	Type	Required	Description	Default
var	any	true	The value to test for JSON

Examples

isJSON Example

Returns true when the argument is a valid JSON value.

Run Example

isJSON( "[1,2,3]" );

Result: true

Additional Examples

Run Example

writeDump( label="Array", var=isJson( "[1,2,3]" ) );
writeDump( label="Single number value", var=isJson( 1 ) );
writeDump( label="String value", var=isJson( "susi12345" ) );
writeDump( label="String value with serializeJSON", var=isJson( JSONSerialize( "susi" ) ) );
writeDump( label="Boolean value with serializeJSON", var=isJson( JSONSerialize( true ) ) );
writeDump( label="CreateDateTime with serializeJSON", var=isJson( JSONSerialize( CreateDateTime( 2018, 1, 1, 1, 1, 1 ) ) ) );
qry = queryNew( "aaa,bbb", "varchar, varchar", [
	[
		"a",
		"b"
	],
	[
		"c",
		"d"
	]
] );
writeDump( label="Query", var=isJson( qry ) );

Related

• ArrayIsEmpty
• IsXMLDoc
• IsBinary
• IsDate
• IsNumericDate
• IsDefined
• IsEmpty
• structIsEmpty
• arrayIsEmpty
• Attempt
• IsCustomFunction
• IsObject
• IsDateObject
• IsXmlAttribute
• IsValid
• IsDebugMode
• IsBoolean
• IsLeapYear
• IsQuery
• IsArray
• IsXML
• IsIPv6
• IsNull
• IsClosure
• IsNumeric
• LSIsNumeric
• IsSimpleValue
• IsStruct
• IsXMLElem
• IsXMLNode
• IsXMLRoot
• IsLocalHost
• IsFileObject